java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/list-simple/sll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:28:07,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:28:07,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:28:07,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:28:07,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:28:07,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:28:07,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:28:07,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:28:07,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:28:07,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:28:07,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:28:07,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:28:07,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:28:07,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:28:07,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:28:07,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:28:07,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:28:07,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:28:07,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:28:07,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:28:07,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:28:07,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:28:07,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:28:07,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:28:07,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 13:28:07,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 13:28:07,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 13:28:07,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 13:28:07,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 13:28:07,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 13:28:07,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:28:07,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:28:07,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:28:07,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:28:07,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:28:07,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:28:07,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:28:07,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:28:07,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:28:07,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:28:07,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:28:07,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 13:28:07,461 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:28:07,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:28:07,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:28:07,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:28:07,467 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:28:07,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:28:07,472 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:28:07,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:28:07,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:28:07,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:28:07,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:28:07,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:28:07,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:28:07,473 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:28:07,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:28:07,473 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:28:07,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:28:07,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:28:07,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:28:07,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:28:07,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:28:07,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:28:07,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:28:07,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:28:07,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:28:07,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:28:07,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:28:07,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:28:07,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 13:28:07,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:28:07,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:28:07,757 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:28:07,759 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:28:07,759 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:28:07,760 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_remove_all.i [2019-10-07 13:28:07,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5ce420c/38d10c20bfdf4771a542056c0879ef40/FLAG3eae72fbe [2019-10-07 13:28:08,308 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:28:08,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_remove_all.i [2019-10-07 13:28:08,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5ce420c/38d10c20bfdf4771a542056c0879ef40/FLAG3eae72fbe [2019-10-07 13:28:08,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a5ce420c/38d10c20bfdf4771a542056c0879ef40 [2019-10-07 13:28:08,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:28:08,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:28:08,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:28:08,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:28:08,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:28:08,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:28:08" (1/1) ... [2019-10-07 13:28:08,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47135583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:08, skipping insertion in model container [2019-10-07 13:28:08,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:28:08" (1/1) ... [2019-10-07 13:28:08,664 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:28:08,720 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:28:09,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:28:09,165 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:28:09,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:28:09,270 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:28:09,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09 WrapperNode [2019-10-07 13:28:09,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:28:09,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:28:09,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:28:09,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:28:09,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... [2019-10-07 13:28:09,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... [2019-10-07 13:28:09,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... [2019-10-07 13:28:09,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... [2019-10-07 13:28:09,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... [2019-10-07 13:28:09,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... [2019-10-07 13:28:09,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... [2019-10-07 13:28:09,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:28:09,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:28:09,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:28:09,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:28:09,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:28:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:28:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:28:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-07 13:28:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-07 13:28:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-07 13:28:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-07 13:28:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-07 13:28:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_first [2019-10-07 13:28:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:28:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:28:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-07 13:28:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-07 13:28:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-07 13:28:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-07 13:28:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-07 13:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-07 13:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-07 13:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-07 13:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-07 13:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-07 13:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-07 13:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-07 13:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-07 13:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-07 13:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-07 13:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-07 13:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-07 13:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-07 13:28:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-07 13:28:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-07 13:28:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-07 13:28:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-07 13:28:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-07 13:28:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-07 13:28:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-07 13:28:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-07 13:28:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-07 13:28:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-07 13:28:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-07 13:28:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-07 13:28:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-07 13:28:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-07 13:28:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-07 13:28:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-07 13:28:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-07 13:28:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-07 13:28:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-07 13:28:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-07 13:28:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-07 13:28:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-07 13:28:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-07 13:28:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-07 13:28:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-07 13:28:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-07 13:28:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-07 13:28:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-07 13:28:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-07 13:28:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-07 13:28:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-07 13:28:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-07 13:28:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-07 13:28:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-07 13:28:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 13:28:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 13:28:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-07 13:28:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 13:28:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-07 13:28:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-07 13:28:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-07 13:28:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-07 13:28:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-07 13:28:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-07 13:28:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-07 13:28:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-07 13:28:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-07 13:28:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 13:28:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-07 13:28:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-07 13:28:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-07 13:28:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-07 13:28:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-07 13:28:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-07 13:28:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-07 13:28:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-07 13:28:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-07 13:28:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-07 13:28:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-07 13:28:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-07 13:28:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-07 13:28:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-07 13:28:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-07 13:28:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-07 13:28:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-07 13:28:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-07 13:28:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-07 13:28:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-07 13:28:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-07 13:28:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-07 13:28:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-07 13:28:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-07 13:28:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-07 13:28:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-07 13:28:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-07 13:28:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-07 13:28:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-07 13:28:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-07 13:28:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-07 13:28:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-07 13:28:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-07 13:28:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-07 13:28:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-07 13:28:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-07 13:28:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-07 13:28:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-07 13:28:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-07 13:28:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-07 13:28:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-07 13:28:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 13:28:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 13:28:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 13:28:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-07 13:28:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_first [2019-10-07 13:28:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 13:28:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 13:28:09,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:28:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 13:28:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 13:28:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:28:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:28:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 13:28:09,779 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-07 13:28:10,017 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:28:10,018 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-07 13:28:10,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:28:10 BoogieIcfgContainer [2019-10-07 13:28:10,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:28:10,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:28:10,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:28:10,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:28:10,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:28:08" (1/3) ... [2019-10-07 13:28:10,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a79f59d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:28:10, skipping insertion in model container [2019-10-07 13:28:10,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:28:09" (2/3) ... [2019-10-07 13:28:10,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a79f59d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:28:10, skipping insertion in model container [2019-10-07 13:28:10,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:28:10" (3/3) ... [2019-10-07 13:28:10,031 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2019-10-07 13:28:10,042 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:28:10,049 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:28:10,061 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:28:10,083 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:28:10,083 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:28:10,084 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:28:10,084 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:28:10,084 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:28:10,084 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:28:10,084 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:28:10,085 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:28:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-07 13:28:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-07 13:28:10,108 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:28:10,109 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:28:10,111 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:28:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:28:10,116 INFO L82 PathProgramCache]: Analyzing trace with hash -434963169, now seen corresponding path program 1 times [2019-10-07 13:28:10,125 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:28:10,125 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:28:10,126 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:28:10,126 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:28:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:28:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:28:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:28:10,318 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:28:10,318 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:28:10,319 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 13:28:10,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 13:28:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 13:28:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 13:28:10,340 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2019-10-07 13:28:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:28:10,411 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-10-07 13:28:10,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 13:28:10,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-07 13:28:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:28:10,423 INFO L225 Difference]: With dead ends: 41 [2019-10-07 13:28:10,423 INFO L226 Difference]: Without dead ends: 27 [2019-10-07 13:28:10,427 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:28:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-07 13:28:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-07 13:28:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-07 13:28:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-07 13:28:10,506 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 13 [2019-10-07 13:28:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:28:10,506 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-07 13:28:10,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 13:28:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-07 13:28:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-07 13:28:10,507 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:28:10,508 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:28:10,508 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:28:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:28:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1328203588, now seen corresponding path program 1 times [2019-10-07 13:28:10,509 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:28:10,509 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:28:10,509 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:28:10,509 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:28:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:28:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:28:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:28:10,657 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:28:10,657 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:28:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:28:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:28:10,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 13:28:10,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:28:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 13:28:10,889 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:28:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 13:28:10,983 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 13:28:10,983 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 10 [2019-10-07 13:28:10,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 13:28:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 13:28:10,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-07 13:28:10,988 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2019-10-07 13:28:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:28:11,048 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-07 13:28:11,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 13:28:11,049 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-10-07 13:28:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:28:11,050 INFO L225 Difference]: With dead ends: 39 [2019-10-07 13:28:11,050 INFO L226 Difference]: Without dead ends: 28 [2019-10-07 13:28:11,052 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-07 13:28:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-07 13:28:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-07 13:28:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-07 13:28:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-07 13:28:11,058 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2019-10-07 13:28:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:28:11,058 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-07 13:28:11,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 13:28:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-07 13:28:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-07 13:28:11,060 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:28:11,060 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:28:11,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:28:11,273 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:28:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:28:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1404376465, now seen corresponding path program 1 times [2019-10-07 13:28:11,274 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:28:11,274 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:28:11,275 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:28:11,275 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:28:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:28:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:28:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:28:11,439 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:28:11,439 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 13:28:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:28:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:28:11,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-07 13:28:11,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 13:28:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 13:28:11,573 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 13:28:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-07 13:28:11,702 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 13:28:11,745 INFO L162 IcfgInterpreter]: Started Sifa with 24 locations of interest [2019-10-07 13:28:11,746 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 13:28:11,753 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 13:28:11,765 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 13:28:11,766 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 13:28:11,983 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-07 13:28:12,161 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-07 13:28:13,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 13:28:13,173 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:275) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:263) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:237) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:216) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 13:28:13,196 INFO L168 Benchmark]: Toolchain (without parser) took 4542.04 ms. Allocated memory was 146.3 MB in the beginning and 245.4 MB in the end (delta: 99.1 MB). Free memory was 101.3 MB in the beginning and 157.9 MB in the end (delta: -56.5 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2019-10-07 13:28:13,197 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 13:28:13,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 622.72 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 101.1 MB in the beginning and 170.0 MB in the end (delta: -68.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-10-07 13:28:13,198 INFO L168 Benchmark]: Boogie Preprocessor took 68.72 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 166.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2019-10-07 13:28:13,201 INFO L168 Benchmark]: RCFGBuilder took 678.91 ms. Allocated memory is still 203.9 MB. Free memory was 166.5 MB in the beginning and 117.4 MB in the end (delta: 49.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:28:13,202 INFO L168 Benchmark]: TraceAbstraction took 3163.83 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 117.4 MB in the beginning and 157.9 MB in the end (delta: -40.5 MB). Peak memory consumption was 926.4 kB. Max. memory is 7.1 GB. [2019-10-07 13:28:13,212 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 622.72 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 101.1 MB in the beginning and 170.0 MB in the end (delta: -68.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.72 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 166.5 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 678.91 ms. Allocated memory is still 203.9 MB. Free memory was 166.5 MB in the beginning and 117.4 MB in the end (delta: 49.1 MB). Peak memory consumption was 49.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3163.83 ms. Allocated memory was 203.9 MB in the beginning and 245.4 MB in the end (delta: 41.4 MB). Free memory was 117.4 MB in the beginning and 157.9 MB in the end (delta: -40.5 MB). Peak memory consumption was 926.4 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...